body {
  font-family:      Arial, Verdana, Helvetica, sans-serif;
  font-size:        medium;
  background-image: url('good.jpg');
  background-size:  100% 300%;
  margin-top:       5%;
  margin-bottom:    5%;
  margin-left:      10%;
  margin-right:     10%;
  padding:          10px 10px 10px 10px;
  background-size:cover;
  background-repeat:repeat;  
  background-position:0% 0%;  
  
}
a {
  text-decoration:  none; 
  font-weight:      600; 
}
a:hover {
  text-decoration:  underline;
}
a img {
  border:           0;
  max-width:      100%;
}
h2 {
  font-size:        150%;
  color:            black;
  text-align:       center;
}
table {
  margin-left:      22px;
  margin-right:     22px;
  caption-side:     bottom;
  border-collapse:  collapse;
  margin:           0px auto;
}
td, th {
  padding:          8px;
  text-align:       center;
}
.copyright {
  font-size:        75%;
  font-style:       italic;
}
.slogan {
  font-size:        75%;
  font-style:       italic;
}
.confirmentry {
  font-weight:      600; 
}

/*** Tables ***/

table {
font-size:          1em;
background-color:   #fafcff;
border:             1px solid #909090;
color:              #2a2a2a;
padding:            7px 5px 2px;
border-collapse:    collapse;
}

td, th {
border:             thin dotted gray;
}

/*** Inputs ***/
input[type=text] {
  font-size:        115%;
  width:            40em;
}
input[type=submit] {
  font-size:        125%;
  position:     relative;
  
}
select {
  font-size:        125%;
}

.ui{
                 width:700px;
                 height:50px;
                 list-style: none;
                 margin:0;
                 padding:0;
             }
        .ui li{
            width:70px;
               margin:0 10px;
            float: left;/*该处换为display:inline-block;同样效果*/

        }

        .ui li a{
            width:70px;
            height:50px;
            padding:0 20px;
            font-size: 12px;
            line-height:50px;
            background: red;
            display: inline-block;
        }